Mechanical movement.



No. 725,041. 4PATENTED APR. 14, 19113. 1. GHRISTIAN. MECHANICAL MOVEMENT.

APPLICATION FILEDV JULY 12, 1902. N0 MODEL. 2 SHEETS-SHEET 1.

No. 725,041. PATBNTED APR. 14, 1903. P. CHRISTIAN.

MECHANICAL MOVEMENT.

APPLIGATION FILED JULY 12. 1902. No MODEL., 2 s3BnTs-smnT a.

UNITED STATES PATENT trice.

PETER CHRISTIAN, OE JOHNSTOVVN, PENNSYLVANIA.

MECHANICAL MOVEMENT.

SPECIFICATION- forming part 0f Letters :Patent NO. 725,041, dated April 14, 1903.4

Application filed July l2, 1902. Serial No. 115,362. (No model.)

To @ZZ whom it may concer-7e:

Be it known that I, PETER CHRISTIAN, a citizen of the United States, residing at Johnstown, in the county of Cambria and State of Pennsylvania, have invented a new and useful Mechanical Movement, of which the following is a specification.

This invention relates generally to mechanical movements, and more particularly to a movement especially adapted for use in connection with steam or other engines, the obje-ct of the invention being to provide a simple and eflicient device by means of which the movement of the driven shaft can be reversed without reversing the movement of the drivingshaft, thereby permitting the engine to continue its movements,vbutat the same time permitting the driven shaft to be reversed Whenever desired.

The invention consists also in the novel features of construction, combination, and arrangement, all of which will be fully described hereinafter and pointed out in the claims.

In the drawings forming part of this speciiication, Figure l is a perspective view illustrating a mechanical movement embodying my invention. Fig. 2 is a side elevation of the same. Fig. 3 is a plan view. Fig. et is a detail illustrating an elevation, the position `of the parts just prior to the reversing operation. Fig. 5 is a section on the line 5 5 of Fig. 4. Fig. 6 is a face view of the cross-head, showing the position of the guide-block when the drivenshaft is being moved in one direction; and Fig. 7 is a similar view showing the position of the guide-block when the driven shaft is being moved in an opposite direction. Fig. 8 is a detail perspective view of one of the spring-arms. Fig. 9is a perspective view of the shifting crank orlever, and Fig. l0 is a perspective view of the guide-block.

Referring to the drawings, A indicates the drive-shaft, having a crank portion Af and a fly-wheel A2, and connecting-rod B is pivotally connected to the crank-arm A', said connecting-rod being also pivotally connected to a reciprocating pitman C, which slides in a suitable guide C', mounted upon a base C2, and carries a cross-head D at its forward end, said cross-head Working in an open guideiframe E, which is also mounted upon the base C2. The driven shaft F is journaled in a Vsuitable bearing F and has a crank-arm F2 mounted upon the end adjacent to the sliding cross-head D, said crank-arm being provided With'a Wrist pin F3, which is surrounded by an antifriction-'roller F4. The face of the cross-head D is recessed, as shown. at D', said recess being essentially lozenge-shaped, and in practice I prefer to make the upper and lower angles D2 slightly rounded, while the side angles are made acute, as most clearly shown in Figs. 6 and 7, and it will be noted that the sides of the said recess instead of being perfectly straight are slightly curved toward the center ot the recess, as most clearly indicated at D3. A guide-block G is pivotally mounted at the center of the recess, the pivot. bolt or shaft G of said block passing through the sliding cross-head D and projecting beyond the opposite face of the same. The guide-block G is `made considerably smaller than the recess D; but its general shape corresponds with the shape of the said recess, its sides being slightly curved, as indicated at G2. A shaft-pin G3 is rigidly connected to the inner face of the guide-block G and a short distance to one side of the line connecting two diagonally opposite corners, the said pin G3 passing through a slot D, produced in the sliding cross-head D. As Vthe cross-head D slides back and forth in the guide-frame the wristpin of the crank-arm working in the recess between the side walls of said recess and the sides of the guide-block will cause the crankarm to be revolved, thereby imparting motion to thedriven shaft, the wrist-pin tripping over the corner of the guide-block at each angle of the recessof the head D, and the direction of motion will be determined ,entirely by the way( the said Wrist-pin trips over the end of the guide-block, and, furthermore, the motion of the wrist-pin will be guided by the shape of the grooved slot into IOO v spring-.fingers H2, rigidly connected thereto,

adapted to straddle the shaft G and operate alternately in opposite directions upon the pin G3 when the said lever or crank is shifted in alternately opposite directions, and in order to accomplish this movement of the lever H, I employ a lever I, which is bifurcated at its free end, as shown at I', each member having a peculiar curved jaw I2, which is adapted to engage the head H3 of the lever. This lever I is pivotally connected to a hand-lever K -by means of a link rod K', arid 'the lever K is provided with the usual thumb-latch K2 and rack-segment K3, so that the said lever can be held at any desired adjustment. When the hand-lever K is in one position, one of the curved jaws l2 will engage the head H3 of the crank or lever H and shift the lever in one direction or the other. In so shifting the 1ever the spring-fingers II2 operate upon the shift-pin G3, and consequently shift the position of the guide-block G. When the position of the hand-lever K is reversed, the opposite curved jaw I2 is brought into position to engage the head H3 and shift the lever 1I to the opposite position, consequently reversing the position of the pin G3 and block G, and, as before stated, this slight reversal of the position of the guide block is sufiicient to produce the reversal in a rotary motion of the driven shaft. In order to lock the lever Hin its adjusted position after contact with the bifurcated lever, I employ spring-arms L, which are fastened to the sliding head D above and below the lever H, each *head earrying a dog L', which is adapted to engageI the rib or shoulder H4, formed upon cran-k or lever H, said pawls or dogs being adapted to engage the said portions H4 after the adjustment has been eifected,and in order to disengage the said dogs whenever a reversal is to be effected I provide the lugs L2,

which engage the beveled heads l3 of the curved jaws I2, thereby pressing the springarms inwardly toward the sliding head and disengaging the pawls L from the rib or shoulder H4 and permitting the crank or lever 4H to be shifted by its contact With the curved jaws 12, it being understood that the beveled head I3 has disengagedthe pawls or dogs L.

It will thus be seen that I provide a'simple and efficient mechanical movement capable of use in connection with any of the engines now in common use and by means of which an instant reversal of the driven shaft can be accomplished without reversing the drivingshaft, said reversal being accomplished by shifting the position of the hand-lever, which results in the shifting of the position of the guide-block within the recess of the sliding head.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. The combination with the sliding head having a recess essentially -loZenge-shaped, the upper and lower angles being slightly rounded, of the shifting block pivotally mounted within the said recess, and all substantially the same shape as the said recess, and a shifting-pin carried by the said block and passing through a slot formed in the sliding head, substantially as described.

2. The combination with a sliding head recessed as set forth, of the guide-block pivoted in said recess, the shifting-pin carried by the guide-block, a lever adapted to operate upon the said shifting-pin; together with means for operating the said lever, as specified.

8. The combination with the sliding head recessed as set forth, of the guide-block pivoted in said recess and provided with a shifting-pin, a lever adapted to operate upon the said shifting-pin, means for operating the said lever together with means for locking the said lever after the shifting operation has been accomplished, as specified.

4. The combination with the sliding head recessed as set forth, of the guide-block pivoted in the recess and provided with a shifting-pin, a lever having spring-fingers adapted to engage the said shifting-pin, a lever bifurcated at one end and having the said bifurcated members curved to engage the lever for the purpose of shifting the same, and the spring-arms carrying locking-dogs adapted to engage the lever after the shifting operation has been accomplished, said lockingdogs being adapted to engage the bifurcated lever before the reversal of the shifting-lever takes place; together with means for operating the bifurcated lever, substantially as set forth.

PETER CHRISTIAN. Witnesses:

GUsTAv KRIsToN, ALEX L. COVER.

IOO

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